Compression and suction device.



J. a. VER NQN. BOMPRESSION AND SUCTION DEVIQE APPLICAUOP? FILED DEC. 29. 1913- ficiency.

' ti FRE JAMES B. VERNON, 0F PITTSBURGH, PENNSYLVANIA.

COMPRESSION AND SUCTION DEVICE.

Specification of Letters Patent.

Patented Jan. 2, fair.

Application filed December 29, 1913. Serial No. 803,381.

To all whom itmay concern:

Be it known that I, JAMES B. VERNON, resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Compression and Suction Devices, of Which the following is a. specification.

This invention relates to apparatus for producing suction or compression, or rotary pumps, and particularly to that class of pumps embodying a chamber in which is eccentrically mounted a rotary hub or piston carrying a number of movable blades which sweep around a crescent shaped space between the piston and outer casing and force the fluid therethrough.

The object of the invention is to produce a pump of the type described, which has high efiiciency and produces a maximum continuous or uninterrupted suction or compression eii'ect, and in which the induction and eduction ports may be. of large area, and are so arranged as to prevent wear of the piston blades.

A further object of the invention is to produce a pump provided with simple and efi'ective means for circulating a liquid therethrough, so as to produce a tight seal between all relatively movable surfaces and lubricate all the moving parts within the pump, and which thereby increases the ef- Further objects of the invention are in part obvious and in part will appear more in detail hereinafter. r

In the drawings Figure 1 represents a front perspective view of a pump embodying the invention, the front casing head and rotor being omitted; Fig. 2 is a longitudinal sectional view on the line 2-2 Fig. 1, and

showing the front end head and rotor, and

with the lower half of the rotor in side elevation; Fig. 3 is a sectional elevation on the line 3-3, Fig. 2 looking in the direction of the arrows; and Fig. 4: is a detail per-,

spective view of one of the piston blades.

Referrin to the drawings, which illustrate one or many forms of the invention, 1 indicates a suitable casing having therein a cylindrical bore or chamber closed at its ends by the heads 2 and 3. One of the end heads may be integral with the cylindrical portion or side wall of the casing, but in the form shown, both of said heads are separate and are clamped to the end faces of the cylindrical portion by tap screws or bolts 4.

by me and Martin J. Siefiert, of even date herewith, Serial No. 809,412. Each blade is pressed yieldingly outward against the side casing wall by one or more springs 8, as shown in Fig. 2, said springs bearing at their inner ends against the bottoms of the slots 7 and having their outer ends lying in notches 9 in the inner edges of the piston blades. These springs allow the blades to move radially in the slots 7 as they travel around the crescent shaped chamber 10, between the pistonand the side casing wall. The piston may be rotated in .any suitable manner and as shown is provided-with end journal portions 11 extending into bearings in the heads of the casing. One of said journals is extended beyond its bearing for connection to the power driving means, and is shown as provided with fast and loose pulleys 12 and 13- for a driving belt. The particular arrangement of the driving means is not essential. p

The pump so far described is of the same general type and construction as that shown in the prior Patent No. 1,018,221, granted jointly to me and George De Camp, February 20th, 1912. In the patented structure the induction and eduction ports were located in one ofthe end heads of the casing.

and communicated with grooves on the inner surfaces of the head, which grooves extended in both directions from said ports of the casing, so they canbe made of any desired size or area and can be extended as close to the ends of chamber asdesired.

As shown '-'n thedrawingsthe lower portion of thecasing is enlarged and cored out the crescent shaped .toffo-rm an induction vchamber 14 and an eduction chamber 15. These chambers are provided with suitable connections 16 and 17, which-respectively. lead to any suitable place where it is desired to produce suction or compression. Theinductionchamber 14: communicates with the crescent shaped I chamber 10 through a plurality of ports 18,

which are shown as elongated slots oropenings inclined to each othercircumfe'rentially c.

. of the casing wall and also inclined to a plane normal to the pump axis, and ar-' ranged inthe form of, two diamonds as shown in Fig. 1., Eduction chamber 15 communicates with the crescent shaped. chamber'lO through a plurality of ports 19, shown as elongated slots-or openingsarranged in the same manner as the openings; 18 and for the same reason. By inclining the slots on openings the movable'pi'ston blades pass: "over saidopenings gradually and contact with the edges. thereof progressively from end to end. With this arrangement there are no sharp edgeslying directly crosswise of the movement of the piston blades to sud-f thereagainst' and wear themdenly impinge out.

be made of any suitable length, so that there is plenty of room in the side wall of the casing for the ports or openings, and each port may be made of any desired area by using theproper number and arrangement of openings, that shown being merely illustrative. o

The lower endsof the openings 18 and 19 lie close to the ends of the chamber 10, and

I said openings extend for some distance away from both ends of said chamber.- They form by-passes around thepistons as they .appreach and recede from the ends of the chamber, and preventthe flow of fluid into and out of's'aidichamber from being interrupted, pulsating, or-intermittent, and also equalize thepressures on the opposite sides 4 of the pistons as they travel past the ports The casing and rotary hub orpiston may also provided for. circulating through the pump av continuous" stream of liquid, which may be glycerin orsome similar material, but is preferably an oil. and thereby serves as a lubricant. As shown in'the drawings eduction chamber 15 is provided, with an outlet 20 at. its lowest point, fromwhich a suitable conduit or pipe, indicated at 21,

leads'to an inlet 22 at or near the top of the induction chamber 14; Said conduit may be provided with "any suitable form of regulating valve 23 for controlling the flow of liquid through the pump, although this is not essential. I v

In use of the apparatus a quantity of .liq-

uid, such as oil, is poured into the'chamber 15'.) Rotation of. the'hub or piston produces a suction eifect in chamber 14 and a coin pression effect in chamber15, The oil is forced out of chamber 15 and flows through the conduit 21 into the chamber 14:, from which it is carried with the inflowing air into the crescent shaped chamber 10. It penetrates into the crevices of the moving parts and lubricates; all the moving surfaces thereof, and also fills all spaces between the pistonblades and cylinder walls and efieca 'tively' seals vthe same thereby preventing escape of air around the" piston blades.

The machine described may be used for various purposes, and either-for its suction or for its compression effect; It can be used for dental purposes; or for cleaning. in which cases the suction effect is most useful, but it is also adapted for producin pompression for operating blow-pipesor li e devices. It is of large capacity for its size, is very elfective and produces a continuous and uninter-' rupted flow of fluidi- It-is self lubricating so that it will run steadily and continuousl or may be operated intermittently over limg periods of time without attention on the part of the operator; so that it is pa cularly adapted for use by unskilled operators or in places where it is. either unlikely to receive attention or. is more or less inaccessible. 'It

will therefore stand considerable neglect or even hard or rough usage without material loss of efficiency.

What Iclaim is: 1; A machine of the character comprising a casing rovided with a chamber, a rotor eccentrlcally located said,

chamber, piston blades movably mounted in said rotor and held with their free edges in described, I

contact with the walls of said chamber, the

' side wall of the casing being provided with induction and eduction ports, each of. said.

portscomprising a plurality of elongated slots inclined to a plane normal to the rotor axis. and converging in both directions circumferentially of the casing toward the ends i of said ports.

2. A machine of the character described,

comprising a casing provided with a pump chamber and side induction and eduction chambers, and a wall separating said pump chamber from said sidechambers, a rotor eccentrically located in said pump chamber, piston blades movably mounted in said rotor and held with their free edges in, contact with the wall of said pump chamber, said separating wall being provided, with induction and eduction ports, each comprising a plurality of elongated slots or' openings lying at an incline to a plane normal to the rotor axis, some of said slots diverging from and others converging toward each other circumferentially of the casing, said ports extending from end to end of the induction and educ- 16 JAMES B. VERNON.

Witnesses ELBERT L. HYDE, GLENN H. LERESOHE. 

